CN101566754B - Liquid crystal display - Google Patents
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- CN101566754B CN101566754B CN 200810167385 CN200810167385A CN101566754B CN 101566754 B CN101566754 B CN 101566754B CN 200810167385 CN200810167385 CN 200810167385 CN 200810167385 A CN200810167385 A CN 200810167385A CN 101566754 B CN101566754 B CN 101566754B
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Abstract
The invention discloses a liquid crystal display (LCD) device having a protection member (160) capable of enhancing reliability against an external impact, and an outdoor visibility against an external light. The LCD device comprises: an LC panel (150) for displaying images; a backlight unit disposed below the LC panel (150), and providing light; a protection member (160) provided on the LC panel(150), and consisting of a tempered substrate (160a) for protecting the LC panel (150) from an external impact, and an anti-reflect layer (160b) formed on the tempered substrate (160a) and reducing areflectivity of external light; and an adhesive layer (160c) formed of a material having a refractive index similar to that of the front polarizer (151) of the LC panel (150) and that of the temperedsubstrate (160a) of the protection member (160), for adhering the protection member (160) onto the LC panel (150) by being interposed therebetween.
Description
Related application
The present invention relates to the theme that comprises in right of priority korean patent application No.10-2008-0036679 that submits on April 21st, 2008 and the right of priority korean patent application No.10-2008-0081337 that submitted on August 20th, 2008, it is included in here with as a reference fully.
Background of invention
1. technical field
The present invention relates to a kind of liquid crystal display (LCD) equipment, and more specifically, relate to a kind of LCD equipment, outdoor visual decline that this protecting component can improve the reliability of opposing external impact and can prevent to cause owing to exterior light with protecting component.
2. background technology
Usually, the cathode ray tube (CRT) of one of widely used display device is mainly used in TV, instrument display, information terminal apparatus etc.Yet CRT is because its weight and size are producing problem aspect compactness that realizes electronic equipment and the lightweight construction.
In order to solve these problems of CRT, develop actively have liquid crystal display (LCD) equipment such as small size, light weight and these advantages of low-power consumption.Recently, for such as notebook, desktop computer, have 30 or the increase in demand of the such flat panel display equipment of the big display of bigger inch and wall hanging TV.
LCD equipment is used for coming display image through the amount of controlling the light that provides from the outside.LCD equipment is provided with the back light unit that comprises the additional light source that is used to light shine the LCD panel.According to the position of light source with respect to the display surface of LCD panel, LCD equipment is divided into peripheral type and full run-down type substantially.Because its higher light utilization efficiency, easy-to-handle characteristic and to the not restriction of size of display surface, Staight downward type backlight unit are widely used in having 30 or the LCD equipment of bigger inch.
Yet the Staight downward type backlight unit has following problem.When using a plurality of cold-cathode fluorescence lamps of transformer parallel drive (CCFL), because the flash-over characteristic of CCFL only has number of C CFL to be driven.More particularly, CCFL had infinitely-great resistance before discharge, and after discharge owing to the conductive plasma that in glass tube, produces has little resistance.Therefore, in case the CCFL discharge, because resistance reduces, the magnitude of current just increases.In other words, when a plurality of CCFL of parallel drive, electric current flows to the CCFL that after discharge, has small resistor.Therefore, number of C CFL is driven, and is not some otherly driven.
In order to address these problems, proposed to use the lamp drive device that is used for LCD equipment of a plurality of CCFL of transformer parallel drive.According to this lamp drive device,, constitute and the identical equivalent electrical circuit of external-electrode fluorescent lamp (EEFL) through additional capacitor (ballast capacitor) on two electrodes of each CCFL with same capacitance.
Here, light EEFL through apply alternating current (AC) to external electrode.In other words, through the electric field that causes owing to the HF voltage that imposes on a pair of external electrode, the discharge space in glass tube discharges, and produces ultraviolet ray thus.Because ultraviolet ray, the fluorescent material that is deposited on the interior circumferential surface of glass tube is luminous, produces visible light thus.
Fig. 1 is the sectional view according to the full run-down type LCD equipment of prior art.
As shown in fig. 1, full run-down type LCD equipment comprises the back light unit that light is provided; Be arranged on the back light unit and receive the LC panel 20 of light; Be arranged on the polarizer 21 and 22 (or polarizing coating) etc. at two side surface places of LC panel 20.Here, back light unit comprises the lamp 48 as light source.
The reflecting plate 42 that is used for reflexing to from the light that lamp 48 provides the front surface of LCD equipment is attached to lower cover 41.
Be provided with the balance PCB 49a and the 49b of a plurality of lamps 48 that are used to be coupled in the both sides of lower cover 41.The inverter PCB 50a that is used to apply AC voltage is connected with 49b with balance PCB 49a respectively with 50b, and this will explain in the back.
On lamp 48, range upon range of being useful on light that supply with from lamp 48 and through reflecting plate 42 reflections towards the front surface of the LCD equipment scatter plate 43 of scattering equably; With optical sheet 44, this optical sheet 44 comprises the prismatic lens and/or the screening glass of the optical function that is used to compensate the light that passes scatter plate 43.
Be provided for keeping imposing on the main supporter (not shown) of the whole equilibrium of forces of LCD equipment.Consider that LC panel 20 is provided with above that, form main supporter to have the step of special pattern on the side surface above that.
Be arranged on a plurality of cell processing of LC panel 20 processes on the main supporter.In other words, LC panel 20 be included in each unit pixel place all have TFT thin film transistor (TFT) (TFT) array base palte 20a, have the filter substrate 20b of the color filter that is used for display color and the LC that between two substrates, injects.
Polarizer 21 and 22 is attached to two side surfaces of LC panel 20.Polarizer 21 and 22 be used for seeing through the light that provides from back light unit with the light of polarization axle equidirectional vibration, simultaneously through using suitable medium to absorb or reflection forms the light with a specific direction vibration with the light of other directions vibrations.Polarizer 21 and 22 is basic modules of TN mode LCD.
The loam cake (not shown) covers the outward flange of the LC panel 20 with polarizer 21 and 22 and the side surface of main supporter, and wherein this polarizer 21 and 22 is attached to LC panel 20.Loam cake is coupled to lower cover 41 through the additional coupling unit such as hook.
Fig. 2 is the skeleton view according to the back light unit of prior art, its shown the balance PCB that time covers and with balance PCB synergistic inverter PCB.
As shown in Figure 2, inverter PCB 50a and the 50b DC power source conversion that will provide from the outside is the AC high pressure.Then, under the control of integrated circuit, the out connector through inverter PCB 50a and 50b is applied to balance PCB 49a and 49b with the AC high pressure.
Then, through conductive wires and high voltage supply figure (or distribution), to ballast capacitor 49a1 and 49b1, the amount of the electric current during feasible thus each that is introduced into lamp 48 managed is identical with the AC high voltage supply that is applied to balance PCB 49a and 49b.Then, the AC high pressure is introduced the lamp 48 corresponding to ballast capacitor 49a1 and 49b1 respectively.
Yet existing LCD equipment has following problem.When being set at such as the such public place of airport or bus terminal; LCD equipment perhaps causes cut by the user of malice to the thin polarizer with 3H or littler skin hardness that is attached on the LC panel outer surface because external impact etc. is damaged.In order to address these problems, need extra cost, this has reduced reliability of products.
In addition, when LCD equipment being arranged on such as external sunlight or indoor light so following time of high brightness levels, if be attached to polarizer on the outside surface of LC panel without extra interface processing, the reflection of light rate through polarizer reflection will be 4% to the maximum.When the polarizer on the outside surface that is attached to the LC panel during through extra interface processing, the reflection of light rate through polarizer reflection will be 1.5% to the maximum.As a result, because its surface reflection, the contrast of LCD equipment reduces.In addition, because metachromatism etc., the outdoor visuality of LCD equipment significantly reduces.
Summary of the invention
Therefore, an object of the present invention is to provide a kind of have can protect the LC panel avoid external impact influence and and can improve the open air visuality the LCD equipment of protecting component.
LCD equipment with protecting component has the light leakage phenomenon, promptly leaks in the edge of protecting component from the light that provides backlight that is arranged under the LC panel.
Therefore, another object of the present invention provides a kind of liquid crystal display (LCD) equipment with protecting component, and wherein extra formation light leaks anti-stop element at one or more fringe regions place of protecting component.
In order to obtain these and other advantage and according to the object of the invention, as concrete expression here with broadly describe, a kind of liquid crystal display (LCD) equipment is provided, comprising: the LC panel that is used for display image; Be arranged under the said LC panel and the back light unit of light is provided; Be arranged on the protecting component on the said LC panel, it is formed by rigid substrates that is used to protect said LC panel to avoid the external impact influence and the anti-reflecting layer that is formed on the said rigid substrates and reduce the reflectivity of exterior light; And adhesion layer, it forms by having with the approximate refractive index materials of the said rigid substrates of said LC panel and said protecting component, is used for through being sandwiched between said protecting component and the said LC panel said protecting component being adhered to said LC panel.
LCD equipment further comprises the one or more fringe regions place that is formed on said protecting component, and the light of the leakage of the light that prevents to provide from said back light unit leaks anti-stop element.
Front of the present invention and other purpose, characteristic, aspect and advantage will become more obvious from detailed description of the present invention with reference to the accompanying drawings.
Description of drawings
Comprise with further understanding is provided to the present invention and form an instructions part the accompanying drawing diagram embodiments of the invention, and be used to explain principle of the present invention with instructions.
In the accompanying drawings:
Fig. 1 is the sectional view according to full run-down type liquid crystal display (LCD) equipment of prior art;
Fig. 2 is the skeleton view backlight according to prior art;
Fig. 3 is the decomposition diagram according to the LCD equipment of first embodiment of the invention;
Fig. 4 is the partial cross section figure of couple state of the LCD equipment of displayed map 3;
Fig. 5 is the view of refractive index of the protecting component of displayed map 3 and 4;
Fig. 6 A is the curve map of contrast (CR) of the LCD equipment of displayed map 3 and 4;
Fig. 6 B is the curve map of color rendering rate of the LCD equipment of displayed map 3 and 4;
Fig. 7 is the partial cross section figure according to the LCD equipment of second embodiment of the invention with Fig. 4 contrast;
Fig. 8 is the skeleton view of the protecting component of Fig. 7.
Embodiment
Describe now the preferred embodiments of the present invention in detail, diagram in the accompanying drawings the example.
Afterwards, will explain in further detail according to liquid crystal display of the present invention (LCD) equipment with reference to accompanying drawing.
Fig. 3 is the decomposition diagram according to the LCD equipment of first embodiment of the invention, and Fig. 4 is the partial cross section figure of couple state of the LCD equipment of displayed map 3, and Fig. 5 is the view of refractive index of the protecting component of displayed map 3 and 4.
With reference to Fig. 3 to 5, comprise: be used for through receive the back light unit (not shown) that voltage provides light from the outside according to liquid crystal display (LCD) equipment of first embodiment of the invention; Be arranged on the back light unit and the LC panel 150 of display image; With the protecting component 160 that constitutes by rigid substrates 160a and anti-reflecting layer 160b; This rigid substrates 160a is formed on the LC panel 150 and protects LC panel 150 to avoid the external impact influence; And this anti-reflecting layer 160b is formed on the reflectivity that rigid substrates 160a went up and reduced exterior light; Wherein protecting component 160 comprises adhesion layer 160c; Adhesion layer 160c is formed by the material that has with the rigid substrates 160a approximated refractive rate of protecting component 160, and through adhesion layer 160c being clipped between protecting component 160 and the LC panel 150 and protecting component 160 is adhered on the LC panel 150.
Two sidewalls (or other fixed part) at the lower cover 100 that is formed by iron or metallide iron (EGI) are located, and are vertically installed with to be used for through receiving the balance PCB 101 and 103 that the AC high pressure drives lamp 120 from outside first and second inverters.
More particularly, balance PCB 101 and 103 is by the connector 101a and the 103a that are used for receiving from outside first and second inverters AC high pressure; Have the ballast capacitor 101b and the 103b that are used for through receiving the AC high pressure stably supplying with the figure of ballast electric current to lamp 120; Thereby with have electric conductivity with the ballast current stabilization supply to lamp 120 lamp socket 101c and 103c constitute, and each lamp socket itself all has about 90 ° angle, thereby is easy to be coupled a plurality of lamps 120.
Pars intermedia office between the balance PCB 101 and 103 that vertically is arranged in the place, both sides is attached to reflecting plate 105 on the lower cover 100.As reflecting plate 105, can use white polyester film or be coated with film such as the such metal material of Ag or Al.Reflecting plate 105 has the reflectivity corresponding to about 90～97% for visible light.The film that applies is thick more, and reflectivity is high more.
A plurality of lamps 120 are coupled to and are fixed on balance PCB 101 and 103 and towards upside crooked lamp socket 101c and 103c.Here, be coupled to lamp 120 maintenances and the constant distance of the back lip-deep reflecting plate that is arranged on lamp 120 105 of lamp socket 101c and 103c at a distance of about 5mm.If the distance between lamp 120 and the reflecting plate 105 is greater than 5mm, then the optical sheet (not shown) with top assembly coupling maybe be because warm and wrinkling.
In order to control the distance between lamp 120 and the reflecting plate 105, may command is vertically set on the balance PCB 101 and 103 of lower cover 100 both sides, perhaps controls the angle of each lamp socket 101c and 103c self.
Control through the angle of controlling each lamp socket 101c and 103c self between lamp 120 and the reflecting plate 105 apart from the time, lamp socket 101c and 103c can be crooked with arbitrary shape, as long as can lamp 120 be coupled to it.The representational shape of lamp socket 101c and 103c comprises " L " shape shown in the figure, perhaps " C " shape or " V " shape.Here, the end of lamp socket 101c and 103c is fixed on balance PCB 101 and 103, and its other end is with the retainer that acts on coupling lamp 120.
As stated, a plurality of lamps 120 are coupled to " L " shape lamp socket 101c and the 103c that is fixed on balance PCB 101 and 103, and have constant interval betwixt.In situation,, approximately arrange 16 lamps for higher brightness with 32 inches large-area LCD TV.And, in situation, approximately arrange 18～20 lamps with 40 inches large-area LCD TV.Yet, use this total principle according to each pattern differently.Here, lamp 120 can be one of cold-cathode fluorescence lamp (CCFL), external-electrode fluorescent lamp (EEFL) and hot cold fluorescent light (HCFL).
Be arranged on the balance PCB that comprises socket 101c and 103c 101 and 103 of both sides, range upon range of side supporter 130 promptly, is used to protect balance PCB 101 and 103 to avoid the retaining element of external impact influence.Here, comprise the inclination special angle and have the tilt frame 130b of semicircle lamp fixed part 130b1, wherein should be used for lamp 120 being fixed to lower cover 100 by semicircle lamp fixed part 130b1 in contact portion with the framework of the side supporter 130 of fashion of extrusion manufacturing; The vertical frame 130a spaced apart and that form in vertical direction with tilt frame 130b; The upper frame 130c that extends from the upside of two frameworks in the horizontal direction.
Here, the vertical frame 130a of side supporter 130 is coupled to two sidewalls of lower cover 100.In order to make connector protruding, preferably some location at vertical frame 130a form the hole, wherein apply the AC high pressure to this connector from outside first and second inverters.
Be arranged on a plurality of cell processing of LC panel 150 processes on the main supporter 145.In other words, LC panel 150 comprises as switchgear and the array base palte, the filter substrate with the color filter that is used for display color that when forming thin film transistor (TFT) at each unit pixel place, form and the LC that between array base palte and filter substrate, injects.
Here, rigid substrates 160a is formed by the nonbreakable glass with about 3mm thickness, thereby can protect wherein LC panel 150 to avoid the influence of external impact.Through nonbreakable glass is strengthened in the distortion of the surface compression of molded plate shape glass and portion's stretcher strain within it, wherein molded plate shape glass is heated to 500 ℃～600 ℃ near softening temperature, and the cold air through compression cools off strongly then.Rigid substrates has corresponding to the bending strength of 3～5 times in general glass, corresponding to the impact resistance property of 3～8 times in general glass and outstanding thermotolerance.Because rigid substrates keeps whole equilibrium of forces therein, so even downcut a side of rigid substrates, entire portion can crackedly be small pieces all.Therefore, before carrying out rigid treatment, need form rigid substrates with the shape that is applicable to said purpose.
The anti-reflecting layer 160b that is formed on the uper side surface of rigid substrates 160a and is exposed to exterior light has the surface through the antireflection sputter process.In other words, when two materials with different refractivity alternately are formed on the rigid substrates 160a with 5 or 6 layers, formed anti-reflecting layer 160b.For example, the ground floor that at first is exposed to daylight or external modulation is formed by the material with low-refraction, and the second layer is formed by the material with high index of refraction, and the 3rd layer is formed by the material with low-refraction once more.Under this structure, fade away when passing each layer from the light of outside incident, reduced reflectivity thus.Yet anti-reflecting layer 160a needn't pass through the surface treatment of using the antireflection sputter.But, but antagonistic reflex layer 160a uses various surface treatment methods, like anti-reflective coating or antipollution processing or the processing of anti-fingerprint.
With the mode of UV or thermmohardening, form adhesion layer 160c by having colloid with top rigid substrates 160a or following polarizer 151 approximated refractive rates etc., this adhesion layer 160c is formed on the downside surface of rigid substrates 160a and with LC panel 150 and contacts.Make the light incide anti-reflecting layer 160b and to pass rigid substrates 160a absorbed (or passing) continuously and have adhesion layer 160c and polarizer 151 with rigid substrates 160a approximated refractive rate.Therefore, farthest be reduced to the total reflectivity of LC panel 150 outsides.
For example; If passing the light of anti-reflecting layer 160b contacts with the air of locating to be provided with in protecting component that comprises anti-reflecting layer 160b 160 and the clearance between the LC panel 150; Then because the different refractivity between rigid substrates 160a and the air, light from the interface between protecting component 160 and the clearance to external reflection.As a result, increase to LC panel 150 outside total reflectivities.
In order to tackle this problem, the adhesion layer 160c on the protecting component 160 is formed by the material that has with rigid substrates 160a approximated refractive rate, and by have with following LC panel 150 or LC panel 150 on the material of polarizer 151 approximated refractive rates form.
As colloid with 1.3～1.8 refractive indexes that are similar to rigid substrates 160a or polarizer 151; Can use from what sony corporation of japan obtained and comprise based on the optics elastic resin of acrylic acid uv-hardening resin SVR (super view resin (ultraphotic resin)) as Main Ingredients and Appearance.Yet colloid of the present invention is not limited to this specific colloid.But can use any colloid, as long as it is within the scope of the invention, for ease, can use UV or thermmohardening to handle.
Here, colloid can extraly comprise at least a in solvent, plastifier and/or the interfacial agent.Colloid has strengthened the engaging force between the polarizer 151 on rigid substrates 160a and the LC panel 150.The amount that can change colloid is handled to quicken UV or thermmohardening.
The form of colloid with liquid is arranged on the downside surface of rigid substrates 160a, following rigid substrates 160a with colloid is attached on the polarizer 151 on the side surface that is formed at LC panel 150.Then, through through UV radiation, perhaps colloid is hardened from the heat supply of LC panel 150 downsides from rigid substrates 160a upside.As a result, formed the protecting component 160 that is coupled to LC panel 150.
Colloid on will being formed at rigid substrates 160a downside surface is attached to the method on the LC panel 150, also can use additive method.In other words, colloid can be formed on the polarizer 151 on the LC panel 150, perhaps when not having polarizer 151, can be formed directly on LC panel 150.Then, rigid substrates 160a is attached on the colloid.Then, colloid perhaps from the heat supply of LC panel 150 downsides, is hardened through the UV radiation from rigid substrates 160a upside thus.Therefore, formed the protecting component 160 that is coupled to LC panel 150.
With reference to Fig. 5, because the refractive index (n2) of the anti-reflecting layer 160b of refractive index of air (n1) and protecting component 160 differs from one another, so the light that incides on the protecting component 160 from the outside at first reflects at it at the interface.Here, pass light outside scattering when passing a plurality of layers that wherein alternately are formed with two different materials of anti-reflecting layer 160b, fade away thus.Then, light continues to pass through and has with the rigid substrates 160a of anti-reflecting layer 160b approximated refractive rate (n3), has and the adhesion layer 160c of anti-reflecting layer 160b approximated refractive rate (n4) and the polarizer 151 on the LC panel 150.Therefore, light does not reflect at each at the interface, has reduced to reflex to the total reflectivity of the outside light of LC panel 150 or protecting component 160 thus.
Here, when rigid substrates 160a has 1.4～1.7 refractive index (n3), when polarizer 151 had 1.4～1.6 refractive index (n5), adhesion layer 160c had 1.3～1.8 refractive index (n4).Each the refractive index that rigid substrates 160a, adhesion layer 160c and polarizer 151 are set makes the difference between it be no more than " 0.2 ".
Therefore, not only reduced the surface reflectivity on the protecting component 160, but also reduced boundary reflection rate, reduced total reflectivity thus by each medium generation.
Afterwards, with the reflectivity relevant simulation of explanation with LCD equipment with protecting component 160.
As experimental conditions, use the LCD equipment of 42 inches sizes with 18 lamps, measurable light level is up to 4000lux.
Fig. 6 A is the curve map of contrast (CR) of the LCD equipment of displayed map 3 and 4, and Fig. 6 B is the curve map of color rendering rate of the LCD equipment of displayed map 3 and 4.
Shown in Fig. 6 A; Have protecting component and having the LCD equipment (AG+ single surfaces A RS) of the anti-reflecting layer that forms on the uper side surface at rigid substrates through sputter process; In the LCD equipment (the two surfaces A RS of AG+) that has through sputter process the anti-reflecting layer that on the uper side surface of rigid substrates and downside surface, forms, observe very approximate contrast (CR).
On the contrary; Based on 4000lux; Wherein polarizer is attached on the LC panel and does not have the LCD equipment (AG Pol) of extra anti-reflex treated (surface treatment), demonstrate each other significantly different contrast with the LCD equipment (ARC Pol) that wherein on a side surface of polarizer, carries out anti-reflective coating.
More particularly, shown in Fig. 6 A, suppose that each contrast (CR) of LCD equipment in dark situation is 1000:1, then LCD equipment (the single surface/two surfaces A RS of AG+) demonstrates the contrast (CR) of about 600:1 in the lighting environment of 4000lux.On the contrary; Have and be attached to the polarizer on the LC panel and do not have the LCD equipment (AG Pol) of extra anti-reflex treated (surface treatment) to demonstrate the contrast (CR) of about 100:1, and the LCD equipment (ARC Pol) that on a side surface of polarizer, carries out anti-reflective coating demonstrates the contrast (CR) of about 300:1.
Through the value of these measurements, can obtain predicted value.For example, have corresponding to 1000 if be exposed to the LCD equipment of daylight out of doors in the environment fully, the intensity level of 000lux, the LCD equipment that then in indoor environment, is exposed to daylight (semi-outdoor environment) has corresponding to about 10, the intensity level of 000lux.And the brightest light fixture has corresponding to about 5 in indoor lamp, the intensity level of 000lux.Fig. 6 A is the curve map that shows according to each contrast (CR) of different intensity levels.
Can find out, based on 4,000lux, contrast (CR) is inversely proportional to intensity level.
Afterwards, with reference to Fig. 6 B, will be explained under the condition identical color rendering rate according to the LCD equipment of each intensity level with Fig. 6 A.
With reference to Fig. 6 B, suppose that all LCD equipment demonstrate 73.4% color rendering rate in the darkroom, LCD equipment then according to the present invention demonstrates about 72.4% color rendering rate 4 in the intensity level of 000lux.On the contrary; Have and be attached to the polarizer on the LC panel and do not have the LCD equipment (AG Pol) of extra anti-reflex treated (surface treatment) to demonstrate about 69.1% color rendering rate, the LCD equipment (ARC Pol) that on a side surface of polarizer, carries out anti-reflective coating demonstrates about 71% color rendering rate.
In LCD equipment according to the present invention; When on the LC panel, protecting component being set; On protecting component, form the anti-reflecting layer that is exposed to exterior light, and between protecting component and LC panel, form the adhesion layer that has with LC panel and protecting component approximated refractive rate.Therefore, can prevent phenomenon, promptly incide on the protecting component light since between the assembly of LCD equipment each at the interface different refractivity and to external reflection.As a result, can significantly reduce the total reflectivity of light, thereby improve outdoor visuality to the LCD device external.
In the present invention, except realizing also can using additive method the method for protecting component through form colloid with UV or thermmohardening mode.For example, adhesion layer can be embodied as double sticky tape, sheet or plate.Here, double sticky tape, sheet or plate must form with rigid substrates and the approximate refractive index materials of polarizer (perhaps being the LC panel when not having polarizer) and not have the clearance betwixt by having.
In LCD equipment according to first embodiment of the invention, protecting component is arranged on the LC panel, can resist external impact and/or exterior light thus, improved outdoor visuality.Yet, according to the LCD equipment of first embodiment of the invention because the thickness of its increase has another problem.In other words, because the interior lights (or light backlight) that the back light unit below being arranged on the LC panel provides, light takes place and leaks in the fringe region place that has the LC panel of protecting component above that.
In order to address this problem, with the LCD equipment of explaining according to second embodiment of the invention.
Fig. 7 is and the partial cross section figure according to the LCD equipment of second embodiment of the invention of Fig. 4 contrast that Fig. 8 is the skeleton view of the protecting component of Fig. 7.
With reference to Fig. 7 and 8, comprise: be used for through receive the back light unit (not shown) that voltage provides light from the outside according to liquid crystal display (LCD) equipment of second embodiment of the invention; Be arranged on the back light unit and the LC panel 250 of display image; With the protecting component 260 that constitutes by rigid substrates 260a and anti-reflecting layer 260b; This rigid substrates 260a is formed on the LC panel 250 and protects LC panel 250 to avoid the external impact influence; And this anti-reflecting layer 260b is formed on the reflectivity that rigid substrates 260a went up and reduced exterior light; Wherein protecting component 260 comprises adhesion layer 260c, and this adhesion layer 260c is formed and protecting component 260 is adhered on the LC panel 250 by the material that has with the rigid substrates 260a approximated refractive rate of protecting component 260; Leak anti-stop element 261 with the light at one or more fringe regions place of the anti-reflecting layer 260b that is formed on protecting component 260.
More particularly, protecting component 260 is by being used to protect LC panel 250 to avoid the rigid substrates 260a of external impact influence; Be formed on the uper side surface of rigid substrates 260a and outwards expose and contact the anti-reflecting layer 260b of exterior light; The adhesion layer 260c that is formed on the downside surface of rigid substrates 260a and contacts with polarizer 251 on LC panel 250 or the LC panel 250; With the one or more fringe regions place that is formed on anti-reflecting layer 260b, and prevent that the light of the light leakage that the back light unit below being arranged on protecting component 260 provides from leaking anti-stop element 261 formations.
Here, rigid substrates 260a can be formed by the nonbreakable glass with about 2～5mm thickness, thereby can protect LC panel 250 to avoid the external impact influence.Through nonbreakable glass is strengthened in the distortion of the surface compression of molded plate shape glass and portion's stretcher strain within it, wherein molded plate shape glass is heated to 500 ℃～600 ℃ near softening temperature, and the cold air through compression cools off strongly then.Rigid substrates has corresponding to the bending strength of 3～5 times in general glass, corresponding to the impact resistance property of 3～8 times in general glass and outstanding thermotolerance.Because rigid substrates keeps whole equilibrium of forces therein, so even downcut a side of rigid substrates, entire portion can crackedly be small pieces all.Therefore, before carrying out rigid treatment, need form rigid substrates with the shape that is applicable to said purpose.
The anti-reflecting layer 260b that is formed on the uper side surface of rigid substrates 260a and is exposed to exterior light has the surface through the antireflection sputter process.In other words, when two materials with different refractivity alternately are formed on the rigid substrates 260a with 5 or 6 layers, formed anti-reflecting layer 260b.For example, the ground floor that at first is exposed to daylight or external modulation is formed by the material with low-refraction, and the second layer is formed by the material with high index of refraction, and the 3rd layer is formed by the material with low-refraction once more.Under this structure, fade away when passing each layer from the light of outside incident, reduced reflectivity thus.Yet anti-reflecting layer 260a needn't pass through the surface treatment of using sputtering method.But, but antagonistic reflex layer 260a uses various surface treatment methods, like anti-reflective coating or antipollution processing or the processing of anti-fingerprint.
Form on the downside surface that is formed on rigid substrates 260a and the adhesion layer 260c that contacts with LC panel 250 with the mode of UV or thermmohardening by having colloid with top rigid substrates 260a or following polarizer 251 approximated refractive rates etc.Make the light incide anti-reflecting layer 260b and to pass rigid substrates 260a absorbed (or passing) continuously and have adhesion layer 260c and polarizer 251 with rigid substrates 260a approximated refractive rate.Therefore, farthest be reduced to the total reflectivity of LC panel 250 outsides.
For example; If passing the light of anti-reflecting layer 260b contacts with the air of locating to be provided with in protecting component that comprises anti-reflecting layer 260b 260 and the clearance between the LC panel 250; Then because the different refractivity between rigid substrates 260a and the air, light from the interface between protecting component 260 and the clearance to external reflection.As a result, increase to LC panel 250 outside total reflectivities.
In order to tackle this problem, the adhesion layer 260c on the protecting component 260 is formed by the material that has with rigid substrates 260a approximated refractive rate, and by have with following LC panel 250 or LC panel 250 on the material of polarizer 251 approximated refractive rates form.
As colloid with 1.3～1.8 refractive indexes that are similar to rigid substrates 260a or polarizer 251; Can use from what sony corporation of japan obtained and comprise based on the optics elastic resin of acrylic acid uv-hardening resin SVR (super view resin (ultraphotic resin)) as Main Ingredients and Appearance.Yet colloid of the present invention is not limited to this specific colloid.But can use any colloid, as long as it is within the scope of the invention, for ease, can use UV or thermmohardening to handle.
Here, colloid can extraly comprise at least a in solvent, plastifier and/or the interfacial agent.Colloid has strengthened the engaging force between the polarizer 251 on rigid substrates 260a and the LC panel 250.Can change the amount of colloid, handle to quicken UV or thermmohardening.
The form of colloid with liquid is arranged on the downside surface of rigid substrates 260a, following rigid substrates 260a with colloid is attached on the polarizer 251 on the side surface that is formed at LC panel 250.Then, through through UV radiation, perhaps colloid is hardened from the heat supply of LC panel 250 downsides from rigid substrates 260a upside.As a result, formed the protecting component 260 that is coupled to LC panel 250.
Colloid on will being formed at rigid substrates 260a downside surface adheres to the method on the LC panel 250, also can use additive method.In other words, colloid can be formed on the polarizer 251 on the LC panel 250, perhaps when not having polarizer 251, can be formed directly on LC panel 250.Then, rigid substrates 260a is attached on the colloid.Then, colloid perhaps from the heat supply of LC panel 250 downsides, is hardened through the UV radiation from rigid substrates 260a upside thus.Therefore, formed the protecting component 260 that is coupled to LC panel 250.
Below one or more fringe regions of protecting component 260, be formed with light and leak anti-stop element (or light leak prevent element) 261, prevent to be provided to the leakage of the light of LC panel 250 thus.Here; Light leaks anti-stop element 261 can be implemented as extra sheet; Or the black matrix" based on resin (BM) that forms through sputter process or photoetching treatment, wherein this photoetching treatment is to use coating method with the identical mode of black matrix" (BM) of filter substrate.Light leaks anti-stop element 261 can be implemented as the burning chromium (CrO with a layer
x).
In the present invention, be embodied as the full run-down type lamp, so light is leaked four fringe region places (or four fringe region places of sheet) that anti-stop element 261 is formed on protecting component 260 because be used as the lamp 220 of the light source of back light unit.Yet if will be embodied as the peripheral type lamp that is arranged on a fringe region as the lamp 220 of the light source of back light unit, the light on the protecting component 260 leaks anti-stop element 261 must only be formed on a fringe region place corresponding with lamp 220.The position that light leaks anti-stop element 261 is not limited to certain location.
When first area that LC panel 250 is divided into display image be arranged on a side of first area and not during the second area of display image, light leaks anti-stop element 261 and preferably is formed on the second area place.Therefore, light leaks anti-stop element 261 and can be divided into through contacting its overlay area that covers loam cake 270 and on protecting component 260, being exposed to the exposed region of exterior light.
The reflectivity that leaks anti-stop element 261 for the light that will be exposed to exterior light remains with the total reflectivity of the light of the first area that reflexes to LC panel 250 (image-region) and equates that light leaks prevents that stop element 261 is formed by the anti-reflecting layer 260b, nonbreakable glass 260a and the similar refractive index materials of adhesion layer 260c that have with protecting component 260.Under this structure, light leaks prevents that stop element 261 has 0.5～1.5% reflectivity.
Except light leaks anti-stop element 261, according to other assemblies of the LCD equipment of second embodiment of the invention, as the lamp 220 of back light unit and balance PCB 201 with according to the component class of the LCD equipment of first embodiment of the invention seemingly.Therefore, with the explanation of omitting to similar assembly.
LCD equipment according to second embodiment of the invention can have various modifications.For example; As shown in Figure 7; The function maximization of the leakage of the light that provides for the back light unit that will prevent below being arranged on LC panel 250; Corresponding with the anti-stop element 261 of aforementioned lights leakage, can further form second light at the outer edge region place between two substrates that are attached to each other and leak anti-stop element.
Here, second light being leaked anti-stop element forms to have with first light and leaks the identical or different width of anti-stop element 261.Yet; Preferably form second light and leak anti-stop element, wherein prevent that with the leakage of second light first area and the interface between the second area of stop element are consistent at the interface that first light leaks between the second area at the first area that is used for display image and a side that is arranged on the first area or many sides place in the anti-stop element 261 to leak anti-stop element 261 identical width with first light.In other words, form second light and leak anti-stop element, the feasible first area that can not cover display image.
Although do not illustrate, the present invention can be implemented as the total reflectivity that can reduce exterior light at the image-region place of LC panel and the LCD equipment of the leakage of the interior lights that can prevent to provide from below.
For example; In order to form protecting component; On the polarizer of LC panel, form adhesion layer, on adhesion layer, form anti-reflecting layer, and be formed at one or more fringe regions place of anti-reflecting layer preventing that the light of the leakage of the light that provides from back light unit from leaking anti-stop element through coating method etc.
Therefore, protecting component can be only by the anti-reflecting layer of the reflectivity that is used to reduce exterior light; Be attached to the LC panel and do not have the clearance and by the material adhesion layer that form, that be used for seeing through the light that absorbs through anti-reflecting layer that has with LC panel and anti-reflecting layer approximated refractive rate; With the one or more fringe regions place that is formed on anti-reflecting layer, the light that is used to prevent the leakage of the light that provides from back light unit leaks anti-stop element and constitutes.
According to its purpose in the technical background scope, the present invention can have various modifications.To in claim, explain according to a preferred embodiment of the invention or the scope of complete preferred embodiment.
LCD equipment according to the present invention is avoided influence such as external impact and has been improved reliability through protection LC panel.In addition, adhesion layer forms by having with the rigid substrates of protecting component and the material of LC panel approximated refractive rate, and does not have the clearance with rigid substrates and LC panel.Therefore, reduced light, improved outdoor visuality thus to the outside total reflectivity of LC panel.
In addition, prevented the light leakage phenomenon, the light that the back light unit that promptly below the LC panel, is provided with provides leaks at one or more fringe regions of the LC panel with protecting component, has kept the uniform luminance of LCD equipment thus.
The embodiment of front and advantage only are schematically, and are endlessly constituting restriction the present invention.This instruction can be applied to the device of other types at an easy rate.It is illustrative that this description is intended to, and does not limit the scope of the claims.A lot of selections, modification and variation it will be apparent to those skilled in the art that.Characteristic, structure, method and other characteristics of exemplary embodiments described here be can make up in every way, thereby other and/or selectable exemplary embodiments obtained.
Because can be under the situation that does not break away from its characteristic with the current characteristic of several mode concrete manifestations; So it should also be understood that; Except as otherwise noted; The foregoing description does not receive the restriction of any details of front description, and should in the defined scope of accompanying claims, explain widely, therefore falls into the scope of claim or the interior all changes of equivalent of this scope and is all comprised by appended claim with revising.
Claims (9)
1. LCD equipment comprises:
At least above that the LC panel that has polarizer and display image on the surface;
Be arranged on below the said LC panel and the back light unit of light is provided;
Be arranged on the protecting component on the said polarizer, it is by being used to protect said LC panel to avoid the rigid substrates of external impact influence and form through being formed on the anti-reflecting layer that reduces the reflectivity of exterior light on the said rigid substrates; With
Adhesion layer, it is formed by the material that has with the rigid substrates approximated refractive rate of said polarizer and said protecting component, and through being sandwiched between said protecting component and the said LC panel and said protecting component is adhered on the said LC panel,
Wherein said protecting component comprises that the light of the leakage of the light that prevents to provide from said back light unit through the one or more fringe regions place that is formed on said protecting component leaks anti-stop element,
The refractive index of wherein said rigid substrates, said adhesion layer and said polarizer differs each other and is no more than " 0.2 ",
Wherein said anti-reflecting layer is formed on the uper side surface of said rigid substrates; On said rigid substrates, alternately form material with antiradar reflectivity and material with high reflectance; And fade away when passing each layer from the light of outside incident, reduced reflectivity thus
Wherein said anti-reflecting layer is through the surface treatment of antireflection sputter.
2. LCD equipment according to claim 1, wherein said rigid substrates has 1.4～1.7 refractive index, and said polarizer has 1.4～1.6 refractive index, and said adhesion layer has 1.3～1.8 refractive index.
3. LCD equipment according to claim 1 and 2, wherein said rigid substrates is implemented as nonbreakable glass.
4. LCD equipment according to claim 1 and 2, wherein said adhesion layer comprise at least a in solvent, plastifier and the interfacial agent.
5. LCD equipment according to claim 3, wherein said adhesion layer comprise at least a in solvent, plastifier and the interfacial agent.
6. LCD equipment according to claim 1, wherein said LC panel are divided into the first area of display image and the side through being set at said first area or many sides place and the second area of display image not,
Wherein form said adhesion layer to adhere on the LC panel and there is not the clearance, and said adhesion layer is corresponding with the said first area of said LC panel, the reflectivity of the exterior light that reduces to provide from the outside, and
Wherein to leak anti-stop element corresponding with the said second area of said LC panel through said light is set, and make said light leak to prevent the leakage of the light that stop element prevents to provide from said back light unit.
7. LCD equipment according to claim 1, wherein said adhesion layer is formed on the lower surface of said protecting component, and said light leaks anti-stop element and said second area is formed in the upper surface of said protecting component accordingly.
8. LCD equipment according to claim 1, wherein said adhesion layer are handled through UV or thermmohardening and are formed.
9. LCD equipment according to claim 1, wherein said light leak anti-stop element by based on the material of resin and at least a formation the among the CrOX.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20080036679 | 2008-04-21 | ||
| KR10-2008-0036679 | 2008-04-21 | ||
| KR1020080036679 | 2008-04-21 | ||
| KR10-2008-0081337 | 2008-08-20 | ||
| KR1020080081337 | 2008-08-20 | ||
| KR1020080081337A KR101274153B1 (en) | 2008-04-21 | 2008-08-20 | Liquid crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101566754A CN101566754A (en) | 2009-10-28 |
| CN101566754B true CN101566754B (en) | 2012-12-26 |
Family
ID=41282987
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810167385 Expired - Fee Related CN101566754B (en) | 2008-04-21 | 2008-11-12 | Liquid crystal display |
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| Country | Link |
|---|---|
| JP (2) | JP2009265593A (en) |
| CN (1) | CN101566754B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5830831B2 (en) * | 2010-03-05 | 2015-12-09 | 大日本印刷株式会社 | Liquid crystal display |
| CN101872035B (en) * | 2010-06-18 | 2012-05-23 | 欧浦登(福建)光学有限公司 | Hard screen polarizer for LCD screen |
| FR3012363B1 (en) * | 2013-10-30 | 2015-10-23 | Saint Gobain | TRANSPARENT LAYER ELEMENT |
| US9618765B2 (en) * | 2014-10-21 | 2017-04-11 | Reald Inc. | High power handling polarization switches |
| KR20180073123A (en) * | 2016-12-22 | 2018-07-02 | 엘지디스플레이 주식회사 | Transparent Displaye device having an emitting area and a transparent area |
| JP7302649B2 (en) * | 2019-09-26 | 2023-07-04 | Ａｇｃ株式会社 | Cover glass for in-vehicle display device and in-vehicle display device |
| JP6984719B1 (en) * | 2020-11-20 | 2021-12-22 | 東洋インキＳｃホールディングス株式会社 | Adhesives and adhesive sheets for polyvinyl chloride |
| CN112859409A (en) * | 2021-02-09 | 2021-05-28 | 捷开通讯(深圳)有限公司 | Display panel, display panel assembly and electronic equipment |
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| JPH0729530U (en) * | 1993-10-28 | 1995-06-02 | シャープ株式会社 | Liquid crystal cell |
| JPH10239693A (en) * | 1997-03-03 | 1998-09-11 | Canon Inc | Liquid crystal device |
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| JP2000338305A (en) * | 1999-05-27 | 2000-12-08 | Dainippon Printing Co Ltd | Antireflection film |
| JP3870632B2 (en) * | 1999-11-02 | 2007-01-24 | セイコーエプソン株式会社 | Electronic device and liquid crystal display device |
| JP2005181939A (en) * | 2003-12-24 | 2005-07-07 | Konica Minolta Opto Inc | Anti-reflection film, and polarizing plate and display device using same |
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| US20080007675A1 (en) * | 1999-01-22 | 2008-01-10 | Sanelle Joseph J | Super bright low reflectance liquid crystal display |
| US20070065091A1 (en) * | 2005-09-22 | 2007-03-22 | Sanyo Epson Imaging Devices Corporation | Electro-optical device, electronic apparatus, protective member, and method of manufacturing protective member |
| US20070258138A1 (en) * | 2005-12-06 | 2007-11-08 | Matt Cowan | Enhanced ZScreen modulator techniques |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101566754A (en) | 2009-10-28 |
| JP2009265593A (en) | 2009-11-12 |
| JP5892981B2 (en) | 2016-03-23 |
| JP2013238883A (en) | 2013-11-28 |
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